Infantile hydrocephalus: retrocerebellar "arachnoidal" cyst.
D001099:Arachnoid; D002552:Cerebral Ventricles / Q000002:abnormalities; D014695:Cerebral Ventriculography; D002555:Cerebrospinal Fluid; D002557:Cerebrospinal Fluid Shunts; D002648:Child; D003560:Cysts / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D003616:Dandy-Walker Syndrome / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology* / Q000601:surgery; D007223:Infant; D007231:Infant, Newborn; D008297:Male